package com.kejiguan.ui.util;

import java.security.MessageDigest;

/**
 * Created by YYY on 2016/5/1.
 */
public class MD5Encrypt {

    public MD5Encrypt() {
    }

    private final static String[] hexDigits = { "0", "1", "2", "3", "4", "5", "6"
            , "7", "8", "9", "A", "B", "C", "D", "E", "F" };

    /**
     * 字节数组转换为16进制串
     *
     * @param b
     *
     * @return 16进制串
     */
    public static String byteArrayToString(byte[] b) {
        StringBuffer resultSb = new StringBuffer();
        for (int i = 0; i < b.length; i++) {

            resultSb.append(byteToHexString(b[i]));
        }
        return resultSb.toString();
    }

    private static String byteToNumString(byte b) {
        int _b = b;
        if (_b < 0) {
            _b = 256 + _b;
        }
        return String.valueOf(_b);
    }

    private static String byteToHexString(byte b) {
        int n = b;
        if (n < 0) {
            n = 256 + n;
        }
        int d1 = n / 16;
        int d2 = n % 16;
        return hexDigits[d1] + hexDigits[d2];
    }

    public static String MD5Encode(String origin) {
        String resultString = null;
        try {
            resultString = new String(origin);
            MessageDigest md = MessageDigest.getInstance("MD5");
            resultString = byteArrayToString(md.digest(resultString.getBytes()));
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return resultString;
    }

}
